INDUSTRIAL STRENGTH G CLAMP is made of heavy-duty cast iron with a machined, stainless steel screw for optimal durability during the messiest projects. COATED SURFACE construction protects your clamps from moisture, preventing rust and corrosion from damaging your clamps. Blue Collar Tools G Clamps will outlast uncoated clamps. HIGH-QUALITY ENGINEERING keeps your G Clamp from bending and warping with reinforcing fins allowing it to squeeze with more force. 2-INCH OPENING is perfect for when you need a firm hold on your metal fabricating or woodworking projects in the garage and woodshop. SWIVELING CLAMP PAD floats in a low-resistance ball-and-socket joint to apply pressure evenly and prevents marring while turning the clamp screw.